Using the Getai currently as they've become my favorite faction since installing EB. Sure they may not have cavalry as powerful as the makedonians until late, sure most of their infantry is lightly armored, but they hit like a ton of bricks even on a frontal charge. Plus, they've got a decent archer base what with the Scythian archers.

Currently, my empire stretches from Segestica to Galatia, all of the Grecian lands are mine. Never started that war, Greece started it by demanding money from me and attacking my ally Macedonia (who would later betray me and kill my faction king in a siege). Seleuka attacked me after I took Nikaia after a rebellion, Pontos (former ally) and the Ptolemies (former ally) attacked me after I took Ipsos which belonged to Seleukos. Now I'm slowly pushing my way east with 3 full stacks and a fourth about to be made.